I may bubble you may bubble he may bubble we may bubble you may bubble they may bubble
V-ing form
I may be bubbling you may be bubbling he may be bubbling we may be bubbling you may be bubbling they may be bubbling
Perfect
I may have bubbled you may have bubbled he may have bubbled we may have bubbled you may have bubbled they may have bubbled
V-ing perfect
I may have been bubbling you may have been bubbling he may have been bubbling we may have been bubbling you may have been bubbling they may have been bubbling
Negation
Simple form
I mayn't bubble you mayn't bubble he mayn't bubble we mayn't bubble you mayn't bubble they mayn't bubble
V-ing form
I mayn't be bubbling you mayn't be bubbling he mayn't be bubbling we mayn't be bubbling you mayn't be bubbling they mayn't be bubbling
Perfect
I mayn't have bubbled you mayn't have bubbled he mayn't have bubbled we mayn't have bubbled you mayn't have bubbled they mayn't have bubbled
V-ing perfect
I mayn't have been bubbling you mayn't have been bubbling he mayn't have been bubbling we mayn't have been bubbling you mayn't have been bubbling they mayn't have been bubbling
Interrogative form
Simple form
may I bubble? may you bubble? may he bubble? may we bubble? may you bubble? may they bubble?
V-ing form
may I be bubbling? may you be bubbling? may he be bubbling? may we be bubbling? may you be bubbling? may they be bubbling?
Perfect
may I have bubbled? may you have bubbled? may he have bubbled? may we have bubbled? may you have bubbled? may they have bubbled?
V-ing perfect
may I have been bubbling? may you have been bubbling? may he have been bubbling? may we have been bubbling? may you have been bubbling? may they have been bubbling?
Interro-negative form
Simple form
mayn't I bubble? mayn't you bubble? mayn't he bubble? mayn't we bubble? mayn't you bubble? mayn't they bubble?
V-ing form
mayn't I be bubbling? mayn't you be bubbling? mayn't he be bubbling? mayn't we be bubbling? mayn't you be bubbling? mayn't they be bubbling?
Perfect
mayn't I have bubbled? mayn't you have bubbled? mayn't he have bubbled? mayn't we have bubbled? mayn't you have bubbled? mayn't they have bubbled?
V-ing perfect
mayn't I have been bubbling? mayn't you have been bubbling? mayn't he have been bubbling? mayn't we have been bubbling? mayn't you have been bubbling? mayn't they have been bubbling?